"This is still early, early days for OS X 10.9, and Mavericks will likely change and shift much more before it's released this fall. It's clearly not going to be the total aesthetic overhaul iOS 7 is, though, and that's okay. It’s a simple, familiar operating system, even less of a change than Mountain Lion, just with nips and tucks and a whole lot fewer sheets of weirdly torn paper. It has its bugs, sure, but it's also corrected a number of bugs that somehow made it into the final version of Mountain Lion, and even at this early stage is impressively stable and fast. It's gotten rid of a lot of the design issues that plagued many Mountain Lion apps (except for Game Center, which is still hideous), in favor of a cleaner, softer look that is far easier on the eyes." Hard to complain, really.

I don't use OSX so don't know how much of an improvement this is, but I was impressed that they're adding in some features for power users. I was under the impression that Apple really didn't give much of a damn about power users, in that it seems it's either their way or the highway when it comes to what kind of options you get. (Which in iOS, is basically none.)